Rob Kardashian Returns to Social Media to Wish Sister Khloé a Happy Birthday

Rob Kardashian posted on Instagram for the first time in months to celebrate Khloé Kardashian's 39th birthday.
He shared a selfie with Khloé and a photo of her with his daughter Dream.
Rob has largely stayed out of the public eye unlike his sisters.
Details about Rob's relationship with ex Blac Chyna were made public last year in a lawsuit.
Other Kardashian-Jenner family members also posted tributes to Khloé on her birthday.